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Old 10-05-2018, 08:33 PM   #11 (permalink)
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Quote:
Originally Posted by Jamie View Post
I can only guess that riding harder then a 2 stoke can handle?
I run Non ethanol fuel as much as possible, full synthetic oil.

20,000 miles on my 04 Skidoo 800 5 motor rebuilds including 2 cranks.

I bought the 800 Polaris hoping it would last longer, 2884 miles and there is a hole in the top of the mag side piston, going 60 to 70mph, 38 degrees outside.
Seems like a lean condition, maybe an injector failed?
When running non-ethanol fuel, you should be adding de-icer to each tank. Otherwise, water from condensation, etc., can build up in the fuel tank and lean the engine. This was a common problem before ethanol fuel came around.
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Old 10-06-2018, 08:15 PM   #12 (permalink)
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Originally Posted by Jamie View Post
I can only guess that riding harder then a 2 stoke can handle?
I run Non ethanol fuel as much as possible, full synthetic oil.

20,000 miles on my 04 Skidoo 800 5 motor rebuilds including 2 cranks.

I bought the 800 Polaris hoping it would last longer, 2884 miles and there is a hole in the top of the mag side piston, going 60 to 70mph, 38 degrees outside.
Seems like a lean condition, maybe an injector failed?
Well something's wrong, i've run two strokes since 1972 and never melted one down once so your 5 ahead of me. Either your fuel or someone futzing with the mixture. If your having problems with 5 two stroke engines, your going to have some with a 4 stroke if someones messing with things or neglect.

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Im going to stick with the 137. Looked on a few web sites and it seems they can be set up to transfer weight.....Not the right way, but they can.
"can be set up to transfer weight.....Not the right way"
Not the right way? So what's not the right way mean. There are tens of thousands of 137's out there "transferring weight the right way". So does Arctic Cat all of a sudden have some sort of flaw now?
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Old 10-07-2018, 02:15 PM   #13 (permalink)
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Well something's wrong, i've run two strokes since 1972 and never melted one down once so your 5 ahead of me. Either your fuel or someone futzing with the mixture. If your having problems with 5 two stroke engines, your going to have some with a 4 stroke if someones messing with things or neglect.


Holy Fuck...negelect? I will take a few pics of my 14 year old sled...You tell me if it looks negelected.



"can be set up to transfer weight.....Not the right way"
Not the right way? So what's not the right way mean. There are tens of thousands of 137's out there "transferring weight the right way". So does Arctic Cat all of a sudden have some sort of flaw now?

Sorry if I offended you by saying they don't transfer weight, I was riding a 2016 viper and I will stand by my quote. It didn't not transfer any weight.

Cheers
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Old 10-07-2018, 02:17 PM   #14 (permalink)
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Originally Posted by patrioticinnovations View Post
When running non-ethanol fuel, you should be adding de-icer to each tank. Otherwise, water from condensation, etc., can build up in the fuel tank and lean the engine. This was a common problem before ethanol fuel came around.
Thanks for the info, I will do that for sure in the future.
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Old 10-07-2018, 02:22 PM   #15 (permalink)
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Quote:
Originally Posted by patrioticinnovations View Post
When running non-ethanol fuel, you should be adding de-icer to each tank. Otherwise, water from condensation, etc., can build up in the fuel tank and lean the engine. This was a common problem before ethanol fuel came around.

The 800 cfis will DET out if any water in the fuel @ pretty much any load & rpm. The piston hole was caused by something other.
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Old 10-07-2018, 02:33 PM   #16 (permalink)
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Location: SE Lower Michigan
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18-19 Mileage 849 so far
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15-16 Mileage: 1310
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The 800 cfis will DET out if any water in the fuel @ pretty much any load & rpm. The piston hole was caused by something other.
So, water leans the mixture out and it detonates, but a lean mixture from something else doesn't?
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Old 10-07-2018, 02:53 PM   #17 (permalink)
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So, water leans the mixture out and it detonates, but a lean mixture from something else doesn't?
Didn t say that. I know the water will cause the det. I ve been down that road with my 800 cfi.. Mine went into det 20 times @ different rpms/load & cold temps. Water will not cause a hole in the piston on a 800 cfi.

I do not know why the op did not go into det or if it did on this sled. With a hole in piston I would suspect it did & I suspect what ever caused it to happen, it happened very fast to burn a hot hole from a lean condition,bad fuel ect...
What do you think happened here?
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Old 10-07-2018, 06:37 PM   #18 (permalink)
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Previous Sled(s): 2003 XCR 1100, 2000 XCR 800, 2005 Redline Revolt 800.
Location: SE Lower Michigan
Favorite Riding Area: Cadillac, Gaylord
18-19 Mileage 849 so far
17-18 Mileage: 1280
16-17 Mileage: 1115
15-16 Mileage: 1310
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Originally Posted by Drumerjb View Post
Didn t say that. I know the water will cause the det. I ve been down that road with my 800 cfi.. Mine went into det 20 times @ different rpms/load & cold temps. Water will not cause a hole in the piston on a 800 cfi.

I do not know why the op did not go into det or if it did on this sled. With a hole in piston I would suspect it did & I suspect what ever caused it to happen, it happened very fast to burn a hot hole from a lean condition,bad fuel ect...
What do you think happened here?
I'd need more info for a total diagnosis. Was fuel just added. What octane? What timing mode? Was the engine ran hard just before this? Was engine just started after trailside stop and T-Map sensor still saw hot underhood air till it slowly stabilized for cooler air, Coolant temp, coolant level?
Etc, etc. A DW analysis is needed to detect any previous indicators.

A hole in a 2-stroke piston is usually due to pre-ignition. This can be caused by an overheated spark plug from being too lean. Plug can also overheat if not fully tightened or wrong heat range. Acts the same as over-advanced timing. And, it can happen so fast that you won't get detonation. The OP was driving at part throttle and fairly high mph by the sound of it. This is a very lean area of throttle operation. And ambient temp was 38 degrees F so water may not freeze as it might in colder conditions. Many factors have to be looked at.
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Old 10-08-2018, 07:48 AM   #19 (permalink)
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To answer your question, They will not transfer and lift skis.
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Old 10-08-2018, 10:13 PM   #20 (permalink)
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Quote:
Originally Posted by Jamie View Post
I was riding a 2016 viper and I will stand by my quote. It didn't not transfer any weight.

Cheers
Didn't transfer "ANY" weight. Ok so technically it was as if you never started it and it just stood there. That would be transferring nothing, as in just sitting, parked.

Maybe not transferring the way you'd like it, That I can understand. But not at all? , that would mean not moving as in parked in one spot.
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